Plunder thanks his "fellow polluters" for coming, before unveiling a plan that will ensure they grow "filthy rich" - they will all pollute the Earth's water supplies, ensuring that nobody can drink from them. Then, the eco-villains will sell pure, uncontaminated drinking water at a ridiculous price to needy citizens.

Greedly starts the process by blowing up a garbage barge, polluting a river. Blight then contaminates another water supply with chemicals and sewage from a treatment plant. Skumm steals barrels of toxic waste and, using his 'Skumm-o-copter', dumps them into yet another clean drinking supply.

Back in the high-rise building, Blight is applying lipstick. She kisses her reflection before stating that they have polluted every drop of water within one hundred miles of the city. Plunder then says that as soon as people get thirsty enough, the eco-villains can start raking in the cash.

Meanwhile, on Hope Island, the Planeteers are working together to plant trees.

Gaia interrupts them with an eco-emergency. In The Crystal Chamber, she shows them images of the polluted water supplies. The images are appearing so rapidly, Linka believes there is something wrong with the Planet Vision. Gaia informs her that it is simply registering images of the worst water-pollution disaster in Earth's history.

Having only the vague location of "central Europe" to work with, the Planeteers hurry to discover the source of the problem, taking off in the geo-cruiser with Wheeler as the pilot.

The geo-cruiser's pollution-monitor alerts the Planeteers to high levels of pollution. Going in for a closer look, the Planeteers realise that the streets are abandoned - there is not a person to be seen.

Kwame suddenly spots them - everyone is lined up in a huge line, exchanging wads of cash for bottled water. Looten Plunder and Hoggish Greedly are seen on the Planet Vision screens working together. The Planeteers are surprised that the two eco-villains have teamed up.

The Planeteers split up - Wheeler and Gi decide to follow Plunder and Greedly, while Kwame, Linka and Ma-Ti go to discover exactly what sort of contamination they're all dealing with.

Wheeler and Gi discover that Plunder is selling clean water. They decide to follow him and Greedly to find out where it is. Gi takes a sample from a nearby gutter, describing the contamination as being as strong as acid. She places the glass vial in her jacket pocket.

She and Wheeler follow Plunder and Greedly to their base. They take the elevator, unaware that they are being watched on security cameras.

A net drops from the roof, trapping them. When Wheeler tries to burn through it, it crackles with blue electricity.

Bleak and Rigger are waiting for Wheeler and Gi as the elevator reaches its destination. The Planeteers are quickly over-powered and taken to the board room, where Plunder, Blight, Greedly and Skumm are all gathered.

Wheeler is surprised and angered to find them all gathered together. He furiously tells Plunder he won't get away with it, but Plunder reveals that the eco-villains have the only clean water supply in the city.

Plunder orders Bleak and Rigger to lock the Planeteers in the holding room.

Meanwhile, Kwame, Linka and Ma-Ti are taking readings elsewhere in the city. They have discovered that all the water they have tested is poisoned, with some puddles containing enough toxins to kill an elephant.

Deciding that they are not finding answers quickly enough, Linka suggests they call Captain Planet. Ma-Ti contacts Wheeler and Gi, who help the others summon Captain Planet before trying to break out of their cell themselves.

Greedly and Plunder are watching via a security camera. Greedly tells Plunder he'll go and stop them from calling Captain Planet, but Plunder suggests letting them do so.

Captain Planet is summoned. He turns to water momentarily to pass through a street grate into the underground waterway where Kwame, Linka and Ma-Ti are standing.

Blight is painting her nails when an alarm goes off, indicating to her that Captain Planet is nearby. She runs to tell Plunder, who then organises that toxic water be washed through that particular tunnel.

Captain Planet is flying through the tunnel with Linka, Kwame and Ma-Ti on his back.

Suddenly, they hear a noise. They stop, only to realise that a flood of polluted water is racing towards them. Linka is frightened, exclaiming "We will drown!"

Captain Planet quickly seals the Planeteers inside a giant pipe.

However, once taking care of the Planeteers, Captain Planet has no time to get himself to safety. He is swept away by the toxic water. The pipe is also swept away, with Linka, Kwame and Ma-Ti rolling and tumbling around inside.

Greedly and Plunder briefly celebrate the fact that Captain Planet is "belly-up in the harbour" after the toxic waste has washed him away.

The sealed pipe drops into the habour and is washed ashore. It appears they have been shut inside for some time - Linka looks angry and bored.

They push the seal open and discover that they have washed onto a beach littered with clumps of toxic waste.

Linka spots Captain Planet - he is washed up on the beach and is unconscious. They hurry to drag him up on the sand, but he is unresponsive. Realising that they need clean water to clean him off, Kwame and Ma-Ti go in search of a fresh water supply while Linka stays with Captain Planet. She holds his hand and begs him to hold on.

Kwame and Ma-Ti are beginning to despair they will find no clean water, when Kwame spots an old tanker ship. They run towards it, hopeful that there is a water tank inside.

They begin search the barrels inside the old tanker, but can find no clean water. Frustrated, Ma-Ti begins to kick the empty barrels over.

Kwame, however, has heard a drop. He and Ma-Ti stop to listen before they track the sound to an old over-head water pipe. They test the water with the water-tester Linka gave them, and are ecstatic to realise it is clean.

Kwame and Ma-Ti take a bucket of clean water to Captain Planet. Ma-Ti washes him off and they all stand back, waiting with bated breath to see if the sun will recharge him.

Captain Planet recharges, much to the Planeteers' relief. He quickly flies off in order to stop the eco-villains.

Meanwhile, Wheeler and Gi are still sitting in the holding room in Plunder's penthouse. Gi realises that the others must have run into trouble, as they are taking so long to come and rescue them.

Wheeler suggests they try to escape themselves, but Gi worries they can't do so without their powers.

However, she then remembers the toxic sample in the vial in her pocket. She takes the vial and uses the toxic liquid to melt the lock on the door. Wheeler then throws his weight against the door, forcing it open.

They hurry to stop the eco-villains, returning to their eco-cycles. However, an alarm begins to sound.

They hurry into the elevator, knowing that the eco-villains have been alerted to their escape.

They hurry to ride their eco-cycles out of the garage of the building, but Bleak and Rigger discover them. Rigger throws the switch to the door, which begins to lower.

Wheeler tells Gi to keep going, no matter what happens, before he speeds up and rides directly at Bleak and Rigger. They scatter, and Wheeler manages to throw the switch to the door. It allows enough time for Gi to get away, but Wheeler is captured and subdued by Bleak.

Plunder enters and demands to know where Gi is. He is not pleased to hear she got away.

He tells them not to be foolish - Captain Planet and his "three other do-gooders" are believed to be dead.

Wheeler cries out a denial and starts to fight Bleak and Rigger, claiming he will get revenge on Plunder. He is restrained, however, and Plunder orders him to be thrown into the back of the truck.

Kwame, Linka, Ma-Ti and Gi are all in the geo-cruiser. They are communicating with Captain Planet via Planet Vision. He is just above the water treatment plant. He tells Gi not to worry about the fact Plunder has captured Wheeler - he tells the Planeteers to meet him at the treatment plant as soon as they can.

Cap confronts the eco-villains, telling them that he's going to stop their plan. However, Wheeler is still their prisoner, and the eco-villains threaten to hurt him if Captain Planet doesn't go away.

Captain Planet spots the geo-cruiser nearby, and plays along, telling Wheeler there is nothing he can do.

Bleak immediately starts to celebrate, jumping up and down shouting "We won! We won!" His actions cause him to accidently knock Wheeler over the edge of the treatement plant.

Wheeler falls towards the toxic water with a loud cry. However, Kwame is hanging from the geo-cruiser by a rope, and swoops in, catching Wheeler behind the knees.

With Wheeler safe, Captain Planet immediately sets to stopping the eco-villains. He uses his powers to turn a truck into a water-sanitising machine which sucks up all the toxic waste and cleans the water, allowing it to be drinkable again.

Captain Planet turns more trucks into "pollution-vacuums" and orders the eco-villains to clear up their own mess.